Surgind Idle? Tried lots of things, pls help..
06-02-04, 12:28 PM
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777** The Anti-rice
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Surgind Idle? Tried lots of things, pls help..
Ok, i have a s5 streetported vert.
mods or intake exhaust ported TB/removed 2ndary throttle plates, and some other various things along with an untuned, but "setup" safc2
My idle has surged ever since i got it back from the auto-manual swap(although it did improve some from disconnecting the auto tranny computer.
I know my TPS is working perfectly, because the SAFC displays the throttle perfectly in sync with my foot.
And today I grounded the trailing and lealding coils, and the fuel injection harness with 14ga wire. When i first started it, it idled smooth at 1500 for a few seconds, then died (probably due to TB mod). but then i started it up again, it still surged. 1k-1.5k.
The rpm graph display on the SAfc looks like a ripply line cuz of the surging
pls help
mods or intake exhaust ported TB/removed 2ndary throttle plates, and some other various things along with an untuned, but "setup" safc2
My idle has surged ever since i got it back from the auto-manual swap(although it did improve some from disconnecting the auto tranny computer.
I know my TPS is working perfectly, because the SAFC displays the throttle perfectly in sync with my foot.
And today I grounded the trailing and lealding coils, and the fuel injection harness with 14ga wire. When i first started it, it idled smooth at 1500 for a few seconds, then died (probably due to TB mod). but then i started it up again, it still surged. 1k-1.5k.
The rpm graph display on the SAfc looks like a ripply line cuz of the surging
pls help
06-02-04, 12:41 PM
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Seduced by the DARK SIDE
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First the SAFC should be reading the wide range TPS, which seems to be working.
The short range TPS tells the ECU when you're at closed throttle.
If anything (vac leak, or just a high idle setting) pushes warmed up idle RPM over 1500, the ECU will fuel cut till it falls back down. (zoom zoom zoom)
Any check codes?
The short range TPS tells the ECU when you're at closed throttle.
If anything (vac leak, or just a high idle setting) pushes warmed up idle RPM over 1500, the ECU will fuel cut till it falls back down. (zoom zoom zoom)
Any check codes?
06-02-04, 12:55 PM
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**-P I drive a miata.
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did you plug the vac line going to the auto transmission? there's a little stub near the brake booster vac connection that sticks out. It's 3/8'ths I think... plug it and your surging will stop.
edit: I am almost positive this is your problem as it was my problem too... almost exactly.
edit: I am almost positive this is your problem as it was my problem too... almost exactly.
06-02-04, 02:51 PM
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777** The Anti-rice
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I regrounded the specified grounds with brand new 10ga wire, and it started up and held a stead 1500 idle, then died, then started jumping again the second time i started it. what in the world.
06-02-04, 03:38 PM
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777** The Anti-rice
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Originally posted by DEZERTE
I regrounded the specified grounds with brand new 10ga wire, and it started up and held a stead 1500 idle, then died, then started jumping again the second time i started it. what in the world.
I regrounded the specified grounds with brand new 10ga wire, and it started up and held a stead 1500 idle, then died, then started jumping again the second time i started it. what in the world.
and nonameo ill check into this now
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06-02-04, 03:54 PM
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**-P I drive a miata.
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trace the FAT hose that comes off of the booster and goes to the left(from your perspective looking over the car, i.e. the brake booster's right)
its about 4 inches TOWARDS the transmission... its a nub you can't miss it! it may be broken off, not sure.
edit: I'd take pics but my dad drove my car to put some miles on it.
its about 4 inches TOWARDS the transmission... its a nub you can't miss it! it may be broken off, not sure.
edit: I'd take pics but my dad drove my car to put some miles on it.
06-02-04, 04:13 PM
#10
Lives on the Forum
check your idle adjust screw, like Sureshot said, you may have it tweaked above that 1500 rpm point, and the ECU is killing it...tweak it clockwise about 1/2 turn, that should drop it a couple hundred rpm...
06-02-04, 05:11 PM
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its the same for S4/S5 NAs, there is a little black rubber cap on the top of the intake manifold, use a flat head screw driver to tweek it down (counter clockwise)
06-03-04, 12:03 PM
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777** The Anti-rice
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Originally posted by WAYNE88N/A
check your idle adjust screw, like Sureshot said, you may have it tweaked above that 1500 rpm point, and the ECU is killing it...tweak it clockwise about 1/2 turn, that should drop it a couple hundred rpm...
check your idle adjust screw, like Sureshot said, you may have it tweaked above that 1500 rpm point, and the ECU is killing it...tweak it clockwise about 1/2 turn, that should drop it a couple hundred rpm...
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